AIM
Determine the natural moisture content of the given soil sample
THEORY
The natural water content also called the natural moisture content
is the ratio of the weight of water to the weight of the solids in a given mass of soil. This ratio
is usually expressed as percentage.
APPARATUS
Non-corrodible air-tight container, Electric oven, maintain the temperature between 1050 C to 1100C, Desiccator, Balance of sufficient sensitivity.
1. Clean the container with lid dry it and weigh it (W1).
2. Take a specimen of the sample in the container and weigh with lid (W2).
3. Keep the container in the oven with lid removed. Dry the specimen to constant weight maintaining the temperature between 1050 C to 1100 C for a period varying with the type of soil but usually 16 to 24 hours.
4. Record the final constant weight (W3) of the container with dried soil sample. Peat and other organic soils are to be dried at lower temperature (say 600 ) possibly for a longer period. Certain soils contain gypsum which on heating loses its water if crystallization. If it is suspected that gypsum is present in the soil sample used for moisture content determination it shall be dried at not more than 800 C and possibly for a longer time.
OBSERVATIONS
AND RECORDING
Data and observation sheet for water content determination
|
S.No. |
Sample
No. |
1 |
2 |
3 |
|
1 |
Weight
of container with lid |
|||
|
2 |
Weight
of container with lid +wet |
|||
|
3 |
Weight
of container with lid +dry |
|||
|
4 |
Water/Moisture
content |
RESULT
The natural moisture content of the soil sample is ________
The natural moisture content of the soil sample is ________
REMARKS
1. A container with out lid can be used, when moist sample is weighed immediately after placing the container and oven dried sample is weighed immediately after cooling in desiccator.
2. As dry soil absorbs moisture from wet soil, dried samples should be removed before placing wet samples in the oven.
1. A container with out lid can be used, when moist sample is weighed immediately after placing the container and oven dried sample is weighed immediately after cooling in desiccator.
2. As dry soil absorbs moisture from wet soil, dried samples should be removed before placing wet samples in the oven.
Geotechnicial Engineering laboratory test
- Physical properties of minerals
- Determination of natural moisture of soil
- Determination of specific gravity of soil
- Sand replacement method
- Sieve analysis-Grain distribution
- Hydrometer analysis of soil
- Determination of liquid limit
- Determination of Plastic limit
- Determination of Shrinkage limit
- Direct shear test
- Proctor test
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